If you have forgotten your password, and do not have access to the email associated with your account, you can use an alternative method to recover your password.
1. Go to https://secure.backblaze.com/user_signin.htm and click 'forgot password'
2. Then click 'more options to recover your password'
3. Then you will need to open the Finder application, right click on /Library/Backblaze, then drag and drop the userPub.pem file.
4. Enter your accounts email address and credit card information, and you can recover your password!